Have noticed this every now and then.
At the time of this screen grab, no other clients were online, just the server.
Have users assumed [not authenticated] and set by machine name = wg user name, ip = wg user for both the listed ones.
Just happens occasionaly and thought it may be worth reporting.
Win2k Pro Sp4, Wingate 5.2.2 KAV 1.2.x and now that I look it has sorted it self out, no further confusion so is a trivial point.
Cheers all.
Nev.
